Oil is added to pickles to prevent microbes from growing. The oil layer stops air from reaching the food, creating a barrier that prevents microbial activity and keeps the pickles fresh for a long time. Class 5 EVS Our Wondrous World ...
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Food spoils when microbes grow on it, changing its smell, taste and colour. Microbes need moisture, air and the right temperature to grow, which is why warm and moist food spoils faster. Class 5 Our Wondrous World – Health and Well-being ...